/*
 *
 * Copyright 2020 Asylo authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef ASYLO_PLATFORM_PRIMITIVES_RANDOM_BYTES_H_
#define ASYLO_PLATFORM_PRIMITIVES_RANDOM_BYTES_H_

#include <sys/ioctl.h>

// An ioctl request that should return 0 in an enclave, and -1 otherwise.
// linux/random.h defines all RNDnumber requests as having group 'R', so give
// this RNDnumber a group 'E'.
#ifdef ASYLO_TRANSITIONAL_DEFINE_FOR_IOCTL
#define RNDINENCLAVE _IOR('E', 0x00, int)
#endif

namespace asylo {

// Returns whether the CPU supports the RDRAND instruction.
bool rdrand_supported();

}  // namespace asylo

#endif  // ASYLO_PLATFORM_PRIMITIVES_RANDOM_BYTES_H_
